On 24/06/2011 04:00, Oli Glaser wrote:
> On 24/06/2011 03:39, YES NOPE9 wrote:
>> I am dealing with an urban fox issue.  Two double lots are side by side.=
  On them are a house and a duplex.  There are wood piles and some other pl=
aces that foxes can hang.   Everything was foxy cool until this spring.  No=
w there are 6 foxes hanging out around here.  And today, one was sitting on=
 my hot tub cover, scratching away his fleas.  I was 3 meters away and mr/m=
s fox did not care.  The fox sauntered off reluctantly when I made some lou=
d noises.
>>
>> So for a variety of reasons, the foxes must go.  Being a very ethical pe=
rson, my first thought is to make them someone else's problem.  Is there a =
chemical that will speak to the foxes " go away , 20 blocks south looks lik=
e a really good place to move to."   Or is trapping the only realistic appr=
oach.  Or will ultrasound chase them away... or shooting tennis balls at th=
em.  I would not want one of them to have a seizure while laughing at me.
>>
>> ( By the way, calling government agents in on the job is a no go..... I =
never willing get involved with the gov )
>>
>> 99guspuppet
> My first thought is ultrasound - easy to implement a test rig and a
> (relatively) humane solution.
> My Pa recently had a problem with horses eating his willow trees, so I
> started "designing" (5 mins with a pic dev board and old speaker :-) ) a
> little "Hossaway" based on a 10F, not tried it yet though. We are a
> little concerned about startling the horses too much, though this
> wouldn't be a problem with foxes.
> I guess a 555 timer would do fine, or any audio range oscillator. I
> would find out what the upper limit of a foxes hearing, then produce a
>   >100dB(?) note of a couple of kHz below - there is info out there on
> the net concerning ranges and what is unpleasant for different animals.
>
>
>

Forgot to mention a detail with this solution - you need an ultrasound=20
speaker. When I mentioned an "old speaker" it was actually one of those=20
ultrasound units. I recall a problem being they are designed for a=20
certain frequency (typically 40kHz) so driving them at lower/higher=20
frequencies is not as efficient.
They use similar in the dog/cat ultrasound shooing devices you can buy=20
though, I wonder what model/frequency they run at...


--=20
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